You must automatically contact proper authorities (police, etc.) and keep the client there as long as possible, so they cannot harm the neighbor.
Answer:
Earthquakes at convergent plate boundaries mark the location of the subducting lithosphere. The motion of the lithosphere as it plunges through the mantle causes the quakes (Figure below). At greater depths, the plate heats up enough to deform plastically.
Repair shop owner who opens a second shop across town
Reduce the price, change the logo or stop selling altogether